A method of controlling fuel delivery in an internal combustion engine includes enabling split injection status without subjection to a temperature comparison while the engine operates in the start mode, and enabling split injection status without subjection to a time limit while the engine operates in the idle normal mode, but with subjection to the temperature comparison in the idle normal mode. In the method, a temperature threshold is established, an engine operating temperature is monitored, the engine operating temperature is compared to the temperature threshold. Further, the engine is operated in the start mode, and at that time, the split injection status is enabled without subjection to the temperature comparison. Thereafter, the engine is operated in the idle normal mode, and at that time, the split injection status is enabled without subjection to a time limit while the engine operates in the idle normal mode and the engine operating temperature falls below the temperature threshold to enhance cold temperature operation. Otherwise, when the operating temperature exceeds the temperature threshold during idle normal mode, the split injection status is disabled.